Ok guys, so my pc has random black screens if im in game or not,but not like gpu is died or driver stoped to work, then i have problem if i turn off pc i cant turn it on, on case button even on a mobo button, then i have to unplague psu cabal wait 10 sec pluuge in and pc turns on. , then i changed the psu still the same problem? Any ideas?. First psu corsair tx650 secound ocz 500w mod extreme pro. Gigabyte 790fxta ud 5 mobo, r9 270x windforce, phenom 965 be cpu